Maximum Drawdown (MDD)
The maximum observed loss from a peak to a trough of a portfolio before a new peak is attained.
Detailed Financial & Mathematical Context
Maximum Drawdown represents the worst-case historical capital reduction for an investor. It is an indicator of downside risk and is a key denominator in the Calmar Ratio.
Video Explainer & Key Moments
Understand how Maximum Drawdown measures downside risk, and calculate the required recovery return to restore portfolio equity.
Frequently Asked Questions
What is Maximum Drawdown (MDD)?
Maximum Drawdown is the largest percentage drop in account equity from a historical peak (high-water mark) to the lowest trough before a new peak is reached.
Why is drawdown recovery asymmetrical?
Drawdown recovery is non-linear. A 10% loss requires an 11.1% gain to recover, a 20% loss requires a 25% gain, a 50% loss requires a 100% gain, and an 80% loss requires a 400% gain to reach breakeven.
What is considered an acceptable Maximum Drawdown for automated trading bots?
Institutional algorithmic systems typically target an MDD of less than 10-15%. Aggressive cryptocurrency momentum strategies often operate with target drawdowns between 20-30%.
How do automated trading bots mitigate Maximum Drawdown?
Trading bots mitigate drawdown through strict stop losses, volatility-adjusted position sizing, automated daily/weekly loss circuit breakers, portfolio diversification across uncorrelated assets, and dynamic exposure scaling.
What is the relationship between Maximum Drawdown and the Calmar Ratio?
The Calmar Ratio divides the annualized compound return (CAGR) by the Maximum Drawdown over a 36-month period. A higher Calmar ratio means greater return per unit of worst-case drawdown risk.
Related Concepts
Comprehension Check
If a $100,000 account grows to $150,000, then falls to $90,000 before reaching $180,000, what is the Maximum Drawdown?